Water reservoir for a reverse osmosis system



FIG. 1 is an elevational view taken from one side of a water reservoir for a reverse osmosis system showing my new design;

FIG. 2 is a top plan view thereof; and

FIG. 3 is a cross sectional view taken on the line 3--3 of FIG. 2. 

The ornamental design for a water reservoir for a reverse osmosis system, as shown and described. 